This document discusses differentiating instruction and assessment for middle and high school students. It covers various components of differentiated instruction including curriculum enhancement, modification, accommodation, adaptations, and learning contracts. It also discusses flexible grouping, assignments, planning for differentiation, accommodating gifted students, underidentified high-achieving students, and relating differentiation to Response to Intervention (RTI). The document provides guidance on preparing engaging lessons, facilitating student participation, effective questioning, discussions, and content-area reading instruction. It concludes with differentiating assessment including linking assessment to instruction, preparing students for high-stakes tests, developing test-taking strategies, and using alternative assessments such as portfolios.